Finding the Fourth Proportional to 257,785.41, 386,831.21 and 139,454.13
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Solution
The fourth proportional to 257,785.41, 386,831.21 and 139,454.13 is: 209,264.01
Step by Step Solution
- Step 1: Write the proportion equation
257,785.41 : 386,831.21 = 139,454.13 : x - Step 2: Convert to fraction form
257,785.41/386,831.21 = 139,454.13/x - Step 3: Cross multiply
257,785.41x = 386,831.21 × 139,454.13 - Step 4: Simplify right side
257,785.41x = 53,945,209,150.13 - Step 5: Solve for x
x = 53,945,209,150.13/257,785.41 - Step 6: Final answer
x = 209,264.01
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.